package com.mankind.ssm.common;

import org.apache.shiro.codec.Base64;
import org.apache.shiro.crypto.hash.Md5Hash;

import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;
import java.net.UnknownHostException;

/**
 * Created by Mankind on 2017/7/13.
 */
public  class util
{
    public static String getRealIP(HttpServletRequest request){
        String ipAddress = request.getHeader("x-forwarded-for");
        if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("Proxy-Client-IP");
        }
        if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("WL-Proxy-Client-IP");
        }
        if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getRemoteAddr();
            if(ipAddress.equals("127.0.0.1") || ipAddress.equals("0:0:0:0:0:0:0:1")){
                //根据网卡取本机配置的IP
                InetAddress inet=null;
                try {
                    inet = InetAddress.getLocalHost();
                } catch (UnknownHostException e) {
                    e.printStackTrace();
                }
                ipAddress= inet.getHostAddress();
            }
        }
        //对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
        if(ipAddress!=null && ipAddress.length()>15){ //"***.***.***.***".length() = 15
            if(ipAddress.indexOf(",")>0){
                ipAddress = ipAddress.substring(0,ipAddress.indexOf(","));
            }
        }
        return ipAddress;
    }
    /**
     * base64加密
     * @param str
     * @return
     */
    public static String encBase64(String str){
        return Base64.encodeToString(str.getBytes());
    }
    /**
     * base64解密
     * @param str
     * @return
     */
    public static String decBase64(String str){
        return Base64.decodeToString(str.getBytes());
    }
    /**
     * md5加密
     * @param str
     * @param salt
     * @return
     */
    public static String md5(String str,String salt){
        return new Md5Hash(str,salt).toString();
    }
}
